Mechanism for tilting fire-bars.



W. R. FEAT, T. PHAT, .73., P. PEAT & H. A. PEAT.

MECHANISM FOR TILTINQ FIRE BARS.

APPLICATION FILED DBO. 31.1907.

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1 n u n m u u .Zizwnfarw W. R. PEAT, T. PHAT, m, P. PEAT & H. A. PHAT.MECHANISM FOR TILTING FIRE BARS. APPLICATION FILED DEC. 31,1907.

920,640. Patented May 4, 1909.

2 SHEETS-SHEET: 2.

UNITED STAThE PATN FFlCiE.

WILLIAM ROBERT PEAT, THOMAS FEAT, JR, PERCY FEAT, AND HARRY ASHWORTHFEAT, OF l ARNWOR'lH, NEAR BOLTON, ENGLAND.

MECHANISM FOR TILTING FIRE-BARS.

Application filed December 31, 1907.

To all whom it may concern:

Be it known that. we, WILLiAM ROBERT PEAT, 'lnonns PEAT, Jr., PERCYFEAT, and Hanna Asnwonrn FEAT, subjects of Great Britain, residing atFarnworth, near Bolton, in the county of Lancaster, Kingdom of GreatBritain, have invented new and useful Improvements in Mechanism forTilting Fire-Bars, of which the following is a cation.

Our invention relates to that type of fire bars for boilers and otherfurnaces which are arranged transversely with respect to the furnace andadapted to tilt and more especially to such for which British Patent N0. 15482 of 1885 was granted to John Settle, and the object of ourpresent invention is to provide improved means for quickly tilting andreturning the said bars at predetermined regular intervals and thusinsure a regular 1propulsion and better combustion of the fue. We attainthese objects by the means illustrated in the accompanying two sheets ofdrawings, in which Figures 1 and 3 are sectional side elevations, Fig. 2a plan partly in section, and Fig. 4 a front view of Figs. 1 and 3respectively of fire bars provided with our im proved tilting mechanism.

Similar letters refer to similar throughout the several views.

In carrying out our invention and referring to the figures generally, a,is the dead plate, b are a plurality of sets of tilting fire ars, thefire bars of one set being arranged alternately with respect of those ofthe other set, 0 a plurality of rods, one connecting the bars of eachset to actuate the same.

According to our invention we connect each of the longitudinal rods 0 bymeans of springs d located on each side thereof to a part6 dependingfrom the front of the dead plate a. One end of the said springs ispivoted to the side of the rods 0 and the other to bolts f passingthrough the said depending part and having a nut g or other meanswhereby the tension of the said springs can be varied at will.

By the aid of a downwardly bent arm the front end of each of the rods 0is pivoted to a lever catch 71 loosely depending from the front part ofthe plate a. Each of these lever catches is adapted to operate inconjunction with a recessed cam t secured upon a shaft 7c suitablymounted in front of the said catches parts Specification of LettersPatent.

Patented May 4, 1909.

Serial No. 408,837.

and having a slow rotary motion imparted, by a double worm wheelgearcomprising a worm Z secured upon the driving shaft m in. gear with aworm wheel a actuating a worm 0 in with a worm wheel p secured upon theshaft 7c. The cams i which are equal in number with the rods 0 are sosecured upon the shaft it that during the tilting of one set of bars theother set remains down, by arranging their recesses g diametricallyopposite each other, as shown in Figs. 1 and 3.

l fhile the fire bars are down, the lever catch it rides upon theconcentric part of the periphery of the cam t and the respective springs(Z are extended, see Fig. 3. As soon as the recess (1 in the said cammeets its lever catch h, the springs (Z withdraw the bar rod 0 causingthe said lever catch to shoot into the cam recess and the fire bars tobe suddenly and energetically lifted, see Fig. 1, after which they willbe lowered again immediately by the said cam forcing the said levercatch out of its recess.

By varying the tension of the springs d by means of the nuts 9 the firebars can be caused to tilt more or less and thus the speed at which thefuel is propelled may be regulated at will.

The feed of the fuel is positive and uniform, no large clinkers can formwhile small ones are delivered into a pit usually pro vided between thesame and the fire bridge at the back of the bars and the fire thusremains constantly bright and clear.

We claim:

1. In a grate, a plurality of sets of tilting fire bars, the fire barsof one set being arranged alternately with respect to those of the otherset, a plurality of rods, one connecting the bars of each set to actuatethe same, a stationary part in front of the said rods, lever catchesloosely depending from the said part and pivotally connected to the'said rods, springs at the side of the said rods connecting each rod tothe said stationary part, a rotating shaft in front of the said catches,and cams rigidly mounted upon the said shaft, the said catchescontacting with 'the periphery of'the said cams to extend the saidsprings, and each cam periphery having a recess, the recess in one cambeing diametrically opposite the recess in the adjacent cam into whichcams the said catches enter to permit the said springs to withdraw thebar rods and thereby actuate the sets of fire bars alternately, allcombined substantially as and for the purpose set forth.

2. In a grate, a plurality of sets of tilting fire bars, the fire barsof one set being an ranged alternately With respect to those of theother set, a plurality of rods, one connecting the bars of each set toactuate the same, a stationary part in front of the said rods, levercatches loosely depending from the said part and pivotally connected tothe said rods, springs at the side 01" the said rods connecting each rodto the said catches, and cams rigidly mounted upon the said shaft, thesaid catches contacting with the periphery of the said cams to extendthe said springs, and each cam periphery having a recess the recess inone cam being diametrically opposite the recess in the adjacent cam intowhich cams the said catches enter to permit the said springs to Withdrawthe bar rods and thereby actuate the sets of fire bars alternately, andmeans in connection with the said springs for varying the tensionthereof, substantially as and for the purpose set forth.

3. In a grate, a plurality of sets of tilting fire bars, the fire barsof one set being arranged alternately with respect to those of the otherset, a plurality of rods, one connecting the bars of each set to actuatethe same, a stationary part in front of the said rods, lever catchesloosely depending from l the said part and pivotally connected to thesaid rods, springs at the side of the said rods connecting each rod tothe said catches, and cams rigidly mounted upon the said shaft, the saidcatches contacting with the periphery of the said cams to extend thesaid springs, and each cam periphery having a recess the recess in onecam being diametrically opposite the recess in the adjacent cam intowhich cams the said catches enter to permit the said springs to Withdrawthe bar rods and thereby actuate the sets of fire bars alternately, andmeans for rotating the said cam shalt, comprising a Worm Wheel securedon secured thereon, an intermediate shaft and a Worm and a Worm Wheelthereon rotating together and respectively in gear with the worm Wheelon the said cam shaft and the Worm on the said driving shaft, allcombined substantially as and for the purpose set forth.

In testimony whereof We have signed our names to this specification inthe presence of two subscribing Witnesses.

l'VILLlAhIi RO ERT FEAT. THOMAS FEAT, JUNIOR. PERCY PEAT.

HARRY ASl'lW ORTH PEAT.

Witnesses ALFRED BOSSHARDT, STANLEY E. BRAMALL.

the cam shaft, a driving shaft and a Worm

